WO2002004567A1

WO2002004567A1 - Method for color matching of bright paint

Info

Publication number: WO2002004567A1
Application number: PCT/JP2001/005463
Authority: WO
Inventors: Tohru Hirayama; Shinichi Gamou
Original assignee: Kansai Paint Co., Ltd.
Priority date: 2000-07-07
Filing date: 2001-06-26
Publication date: 2002-01-17
Also published as: KR100772957B1; US6741260B2; JP4822648B2; US20030067475A1; KR20020031173A; CA2384127A1

Abstract

A method for color matching of a bright paint by using a computer color matching apparatus comprising (A) a colorimeter, (B) a micro brightness sample color chart, (C) a computer where formulations of paints, color data and micro brightness data corresponding to the formulations, color characteristic data and micro brightness characteristic data on primary color paints are registered and color matching calculation logic operates, comprises the steps of (1) measuring the reference color with which the color of a paint is matched by means of the colorimeter to collect color data on the reference color, (2) comparing the reference color with the micro brightness sample color chart to determine the micro brightness of the reference color, and (3) comparing the color data and micro brightness data on the reference color with the color data and micro brightness data corresponding to the formulation registered in the computer to select the candidate paint formulations.

Description

Specification

Method of toning paints with glitter

The present invention relates to a computer toning device and a method for toning a paint having glitter using a micro glitter sample color chart.

Background art

Computerized color matching systems are known, for example, as described in US Pat. No. 3,601,589. The US patent states that the total spectral reflectance of an unknown color panel is determined by a scanning spectrophotometer, and this reflectance data is sent to a computer, where the computer determines the K value (“light absorption coefficient”) of the pigment. A method of mathematically processing pre-stored data representing three values (indicating “light scattering coefficient”) and three values (indicating “light scattering coefficient”) to perform logical color matching is disclosed.

The disclosure of the above US patent basically relates to a series of calculation procedures. In other words, according to this calculation procedure, the K value and the S value can be calculated for one spectral wavelength, and the K and S values of a set of pigments can be calculated as described above. It can be determined to be equal to the K and s values of the unknown color for each spectral wavelength. This is the basic color matching algorithm used in other spectrophotometric-based color matching systems.

The problems with the U.S. patent are that the first is very expensive and difficult to maintain, and the second uses data obtained for known pigments of unknown color. That is, logical color matching is performed. That is, The final color obtained by mixing the pigments according to the calculated color values may be different from the unknown color. Therefore, the color matching formula is usually a first-order mathematical approximation and requires correction and adjustment of the system.

In order to improve the above system, for example, in Japanese Patent Application Laid-Open No. 63-153637, a selected color is analyzed using a portable color camera and the hue, saturation, and saturation of the selected color are analyzed. The color data representing the lightness is stored, the color data in the force meter is connected to a computer, and a plurality of available color formulas (paint formulations) are stored in the computer, and the stored color formula is stored. Color data representing the hue, saturation, and lightness of each paint specified by the various color formulas in the computer; and the color data of the selected color received from the color meter; Comparing the stored color data representing each of the color formulas to find the closest match; and storing the color formula represented by the color data found as the closest match. Selected, method and apparatus for so I shade has been proposed for by connexion the selected color thereto.

Also, in recent years, the color of glittering paint with aluminum powder and glittering powder has been increasing from the viewpoint of diversification of personal preference and improvement of cosmetics, etc. ing. When performing color matching when repairing this brilliant paint color, the color matching method described in the above-mentioned JP-A-63-153637 does not provide sufficient color matching accuracy. There has been no computer-accurate color matching method for paint colors with a brilliant feeling. In addition, there is a problem that it is difficult for a color-toner who has little experience to adjust the color with a glittering color. Furthermore, with commercially available colorimeters, it is not possible to measure the brightness of the micro mouth separately, so even if the colors match, the brightness of the micro mouth (for example, the aluminum eyes or the glittering texture of aluminum) will match. Often there were no.

SUMMARY OF THE INVENTION An object of the present invention is to provide a computer toning method capable of performing color matching with high accuracy even for a brilliant paint color, and enabling a toner with little experience to easily perform toning. .

Disclosure of the invention

The present inventors have proposed a computer toning system comprising a colorimeter, a micro-brightness sample color chart, and a combination computer in which various paint formulations, paint colors, etc. are input and color matching calculation logic operates. It has been found that the above object can be achieved by using the apparatus, and the present invention has been completed.

That is, the present invention provides (A) a colorimeter, (B) a micro glitter sample color chart, (C) a plurality of coating compositions, color data corresponding to each of the paint compositions, and Mikuguchi glitter data. A computer toning consisting of a computer in which the color characteristic data of a plurality of primary color paints and the brightness characteristic data of the mouth opening are registered, and a computer in which a color matching calculation logic using the paint composition and each data is operated. Provided is a method for toning a paint having a brilliant feeling, which is characterized by performing the following steps (1) to (3) using an apparatus (hereinafter, may be referred to as a "first toning method"). Things.

(1) a process of measuring a reference color to be matched with the paint color by colorimetry with a colorimeter and obtaining a color image of the reference color;

(2) a step of comparing the reference color with a Miku Mouth glitter sample color chart to determine the micro glitter of the reference color; (3) Compare the color data and Miku Glitter of the reference color with the color data and Miku Glitter data corresponding to the paint composition registered in advance in the computer, This is a process of indexing the degree of matching of Miku mouth glitter and selecting a candidate paint formulation.

Further, in the present invention, after the above step (3), (4) a step of correcting the selected candidate paint composition by using a color matching calculation logic to obtain a corrected composition that is closer to the reference color. The above-mentioned toning method is provided.

Further, the present invention provides the above-mentioned toning method, characterized in that the candidate paint composition obtained in the step (3) or the modified composition obtained in the step (4) is transmitted to an electronic balance.

Further, the present invention provides (A) a colorimeter, (B) a micro glitter sample color chart, (C) a plurality of color numbers, respective paint formulations corresponding to the color numbers, and colors corresponding to the respective paint formulations. Data and Miku-guchi glitter data, color property data of multiple primary color paints and micro-glitter property data are registered, and each of the paint formulations and the computer that operates the color matching calculation logic using the data are registered. A method of toning a paint having a brilliant characteristic, which comprises performing the following steps (5) to (7) using a computer toning apparatus having the above-mentioned structure (hereinafter referred to as “second toning method”). ).

(5) a process of measuring a reference color to be applied with the paint color by toning with a colorimeter and obtaining color data of the reference color;

(6) a step of comparing the reference color with a Miku-glow glitter sample color chart to determine the Miku-glow glitter of the reference color;

(7) At least one of the same color numbers as the preset color numbers of the reference colors Color data and micro-brightness data of the paint composition of the selected paint composition, and compare the color data and micro-brightness data of the selected paint composition with the color data and micro-brightness of the reference color. The process of indexing the degree of matching between the color and micro glitter of the paint composition and selecting a candidate paint composition.

In addition, the present invention further comprises, after the above step (7), further (8) a step of correcting the selected candidate paint composition by using a color matching calculation logic to obtain a corrected composition that is closer to the reference color. The present invention provides the above-mentioned toning method characterized in that the method is performed.

The present invention further provides the above-mentioned toning method, further comprising transmitting the candidate paint composition obtained in the step (7) or the modified composition obtained in the step (8) to an electronic balance. is there.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the toning method of the present invention will be described in detail.

According to the toning method of the present invention, a paint having a brilliant feeling capable of forming a brilliant coating film is operated by a colorimeter (A;), a Miku-guchi brilliant sample color chart (B) and a color matching calculation logic. This is a method of toning using a computer (C). Examples of the paint having the brilliant feeling include flake-like aluminum powder, vapor-deposited aluminum powder, colored aluminum powder, mica-like iron oxide, mica powder, metal oxide-coated mica powder, metal oxide-coated silica flake, and glitter. Examples include glittering pigments having a glittering interference effect, such as grit graphite, glittering powders such as metal powders such as copper powder, and paints containing coloring pigments as necessary.

Colorimeter (A)

The colorimeter (A) is a machine for measuring the color of a coating film and obtaining color data of the coating film. If it is a measuring instrument that can achieve this purpose, a known colorimeter can be used.

As the colorimeter, a multi-angle colorimeter having a multi-angle measurement angle is preferable. In a multi-angle colorimeter, two or more angle conditions, usually two to four, are used, that is, the angle of incidence of the measurement light is different, or the light-receiving angle is the angle between the specular reflection axis and the light-receiving axis. Measure under two or more conditions. The specular reflection axis is an axis that forms a reflection angle when the incident angle and the reflection angle are the same angle. For example, when the incident angle is 45 degrees, the reflection angle is 45 degrees.

When changing the light receiving angle, the angle condition is not particularly limited, but usually, when the angle condition is 2, the light receiving angle is in the range of 15 to 30 degrees and 75 to 110 degrees. If the angle condition is 3, the light receiving angle must be one of each of the angle ranges of 15 to 30 degrees, 35 to 60 degrees, and 75 to 110 degrees. Further, when the angle condition is 4, it is visually confirmed that the light receiving angle is each one of the angle ranges of 15 to 30 degrees, 35 to 60 degrees, 70 to 80 degrees, and 90 to 110 degrees. This is preferable because it is easy to correspond to the determination of the color. Each measurement value (angle-based measurement value) obtained by measuring the color of the coating film under each angle condition may be any value that can specify the color, such as representing lightness, saturation, hue, or calculating. , XYZ color system (X, Y, Ζ), L * a * b * color system (L *, a *, b * value), Hunter Lab color system (L, a, b value), CIE It can be represented by the L * C * h color system (L * value, C * value, h value) and the Munsell color system (H, V, C) specified in (1994). Display by the * a * b * color system or the L * C * h color system is common in the display of colors in the industrial field including the automobile repair painting field. Miku Mitsuguchi Kokan Taiko. (B)

The micro glitter means a unique glitter texture that appears in a paint color including a glitter pigment such as aluminum powder and glitter powder. For example, the roughness of eyes such as anoremi and my power, glare, glitter, brilliant texture, grain size, etc. are applicable. The micro-brightness sample color chart (B) selects a color chart that has similar Miku brilliance compared to the micro-brightness of the reference color to be matched with the target paint color, and uses this color chart to determine the target It is used to determine the micro glitter of a paint film to be coated.For example, a paint containing a glitter material obtained by changing the material, particle diameter, blending amount, etc. of the glitter material in the paint, Each of the color patches coated and dried on the substrate can be systematically arranged.

Specific examples of the Miku mouth glitter sample color chart (B) include, in the field of automotive repair painting, for example, booklets and cards that list the paint colors of cars in Japan and overseas by year and by car manufacturer. be able to.

The Miku Glitter Sample Color Chart (B) contains Miku Glitter Data or a color number or color name. Various data can be considered as _c Miku mouth glitter data that need to be able to extract the evening, but the present inventors consider that both of the two micro glitter parameters, `` MGR '' and `` MBV '' However, they found that the microbrilliance matched well when the consistency was high, and in the specification of Japanese Patent Application No. 2000-28414, explained the method of toning a paint using these Miku Mouth glitter parameters. “MGR” is a parameter that represents the graininess (perception generated from the orientation of glittering pigments in the coating film, irregularities caused by overlapping, and non-directional patterns (random patterns)). “MBV” is a parameter that quantifies the glitter (perception of irregular and fine shine caused by light specularly reflected from the brilliant pigment in the coating film).

“MGR” and “MBV” can be obtained from a two-dimensional image formed by photographing the surface of a bright coating film that has been irradiated with a CCD camera.

“MGR” is a two-dimensional power spectrum expressed by the following equation obtained by integrating the power of low spatial frequency components from the spatial frequency spectrum obtained by performing a two-dimensional Fourier transform on the two-dimensional image and normalizing the power with the DC component. The vector integral value (hereinafter sometimes abbreviated as “IPLS”) is obtained and calculated from the two-dimensional power vector integral value.

Formula 1

■ 2π

Ρ (Θ) d d

Two-dimensional power vector »min ≤

P (0, 0;

(Where, is the spatial frequency, S is the angle, P is the power spectrum, 0 to L is the extracted low spatial frequency range, and L is the upper limit of the extracted frequency.)

The “particle feeling” can also be evaluated based on the MGR value calculated by the following linear equation based on the two-dimensional power spectrum integral (IPSL).

If the value of I PSL is 0.32 or more,

MGR = [(I PSLX1000)-285] / 2,

If the value of I PSL is between 0.15 and I PSL and 0.32, MG R = [IPSL x (3 5 / 0.17)-(5 2 5/1 7)] / 2

If the value of IPSL is 0.15 or less, MGR is set to 0.The value of MGR is set to 0 when there is no graininess of the glittering material, and almost all of the glittering materials have graininess. The value is set to 100, and the greater the “particle feeling”, the larger the value.

“MBV” is a value calculated based on data obtained by analyzing a two-dimensional image taken by a CCD camera with an image analyzer and calculated as follows.

That is, the two-dimensional image is divided into a number of sections, the brightness of each section is summed over all of the sections to obtain a total value, and this total value is divided by the total number of sections to obtain the average luminance X. Then, set the threshold a to a value equal to or higher than the average luminance X. Suitably, the threshold value is usually the sum of the average luminance X and y (y is a number between 24 and 40, preferably between 28 and 36, more preferably 32).

Then, by subtracting the value of the threshold α from each of the luminance of the compartments, the subtracted value is total the subtraction value is a positive value, also _c obtain total volume V which is the sum, over the threshold value α The total area S, which is the total number of sections having luminance (the total number of sections having the threshold value α or more obtained by performing binarization with the threshold value α), is obtained. The average height PHa V of the luminance peak is calculated by multiplying the value obtained by dividing the total volume V by the total area S, since the luminance peak can be approximated to a cone or a pyramid, that is, the following equation:

PH a V «= 3 V / S Is the value obtained by

In addition, a threshold value iS which is equal to or more than the average luminance X and equal to or less than the threshold value is set. The threshold value; 5 is equal to or less than the threshold value, and the average luminance X and z (z is a number of 16 to 32, preferably 20 To 28, more preferably 24).

Then, the value of the threshold value / S is subtracted from each luminance of the above section, and the subtracted value whose subtracted value is a positive value is totaled to obtain a total volume W which is the sum thereof. The total area A, which is the total number of sections having a luminance of (the total number of sections equal to or greater than the threshold obtained by performing binarization with threshold / S), is obtained. The average height PH av / 3 of the luminance peak at the threshold value ^ is assumed to be 3 times the value obtained by dividing the total volume W by the total area A, since the luminance peak can be approximated to a cone or a pyramid. Expression

PHa V ^ = 3 W / A

Can be a value obtained by

Further, the average particle area of the optical particles can be obtained from the total area A at the threshold value / 5 and the number C of the optical particles exhibiting the luminance of the threshold value 3 or more. In the present invention, “optical particles” means “independent continuum whose luminance is equal to or higher than a threshold on a two-dimensional surface image”. Assuming that the shape of the optical particles is a circle, the diameter D of a circle having the same area as the average particle area is represented by the following equation.

Formula 2

From the above PHa v / 3 and L, the average skirt spread rate PS a V of the luminance peak is calculated by the following equation. PS av = D / PH av ^

Get by.

The brightness value BV is calculated from the average brightness peak height PH av α obtained as described above and the average skirt spread rate P S a V of the brightness peak obtained as described above using the following equation.

B V = P H a V α + aP S a ν

(Where a is 300 if PHa v α is less than 25, 1050 if ΡΗ a V is greater than 45, and if PHa v "is a number from 25 to 45, , The following formula

a = 300 + 37.5 x (P H av «-25)). The value of MBV can be obtained by calculating the following linear equation based on the brightness value BV.

MB V = (B V— 50) / 2

The value of the MBV is 0 when there is no glitter, and the value with the most glitter is almost 100, and the greater the value, the larger the value.

Computer on which colorimetric logic operates (C)

The computer (C) contains a plurality of paint formulations, color data and micro-brightness data corresponding to each paint formulation, color property data and micro-glow brightness property data of a plurality of primary color paints, and if necessary, A plurality of color numbers and paint compositions corresponding to the color numbers are registered, and the computer (C) operates color matching calculation logic using the paint compositions and the respective data. Also, if necessary, micro glitter data of color numbers or color names It may be registered and be able to extract micro glitter data corresponding to the color number or color name.

The color data corresponding to each paint composition registered in the computer can be colorimetric data of a paint film obtained from each paint by a multi-angle colorimeter.

As the color characteristic data of the primary color paint registered in the computer, for example, the K value (light absorption coefficient) and the S value (light scattering coefficient) of the primary color paint can be used. The K value and S value can be obtained, for example, by numerically processing the colorimetric data of the primary color paint and the light color of the primary color paint.

The above-mentioned color numbers registered in the computer as necessary are usually color code numbers specified for each coating product manufacturing company, and according to the color numbers, paint mixes for repair painting Is registered. This paint composition can be one for one color number, but it can also include actual compositions, and a plurality of paint compositions may be registered. For each of these paint formulations, the colorimetric data of the formed coating film by a multi-angle colorimeter is also registered in the computer in advance.

The computer toning method of the present invention includes a first toning method that does not include a step of selecting a paint composition from among the same color numbers using color numbers, and a method using the same color numbers using color numbers. There are two embodiments of the second toning method including a step of selecting a paint formulation from the method.

First, the first toning method will be sequentially described based on each step. Culm (1)

The step (1) is a step of measuring, with the colorimeter (A), a coating film of a reference color to which the coating color of the paint is to be adjusted by toning to obtain color data of the reference color. It is preferable that a reference color, which is the color of a coating film to be coated, is measured by the multi-angle colorimeter to obtain color data under the above-mentioned angle conditions. When a repair coating is formed in a repair coating such as automobile repair coating, it is necessary that the difference between the color of the coating in the repair coating area and the color of the coating film near the repair coating area should not be visually observed. Therefore, it is usually appropriate that the reference color is the color of the coating film near the repair coating portion.

Culm (2)

The step (2) is a step of comparing the reference color with the micro glitter sample color chart (B) to determine the Miku mouth glitter data of the reference color. Normally, a color patch that is considered to be closest to the micro-luminance of the reference color is selected from the Mikuguchi glitter sample color patch (B), and the micro-glitter data is determined based on the selected color patch. The micro glitter data and the blending ratio of the glitter material may be described on each color chart, and the micro glitter data and the blend ratio of the glitter material can be obtained separately from the color number and color name of the coating color of each color chart. It may be as follows.

T Jg (¾)

In the step (3), the color data of the reference color obtained in the step (1) and the micro glitter of the reference color obtained in the above step (2), and the color data corresponding to the paint formulation registered in the computer in advance Then, the degree of matching between the registered paint composition color and the Miku mouth glitter is indexed, and a candidate paint composition is selected. In selecting a candidate paint formulation, the most reasonable one can be selected as appropriate, taking into account the degree of matching between the reference color and the glossiness of the Miku mouth, formulation data, and the like. This selection method is not particularly limited. Candidate paint formulations are, for example, those whose color difference from the reference color and the degree of matching of the glossiness of the mouth are within a certain range. It is preferred to choose.

The first toning method requires the above steps (1), (2) and (3) as essential steps. However, after step (3), the following steps (4) ) May be performed.

Culm (4)

Using a computer in which a plurality of paint formulations, color data corresponding to the respective paint formulations and Miku mouth glitter data, and color characteristic data of a plurality of primary color paints and Miku mouth glitter data are registered, the process (3) This is a step of correcting the candidate paint formulation selected in the above) by using a color matching calculation logic utilizing the paint formulation and the respective data to obtain a corrected blend that is closer to the reference color.

The first toning method may further include a step of transmitting the candidate paint composition obtained in the above step (3) or the correction composition obtained in the step (4) to an electronic balance.

Next, the second toning method will be described.

In the second toning method, a plurality of color numbers and paint compositions corresponding to the color numbers were also registered as data registered in the computer used in the first toning method. Perform steps (5) to (7) below using

Tengaku (5)

Step (5) is the same as step (1) in the first toning method.

Culm (6)

Step (6) is the same as step (2) in the first toning method. T. ^ (7)

In step (7), from among the color numbers registered in the computer in advance, the color data of at least one paint composition having the same color number as the reference color and the micro glitter data are selected, and the selected paint composition is selected. The color data and the micro glitter data of the reference color are compared with the color data of the reference color and the micro glitter, and the matching degree of the color and the gloss of the mouth opening of the selected paint composition is indexed to obtain the candidate paint. Select a recipe. In selecting a candidate paint formulation, the most reasonable one can be selected as appropriate, taking into account the degree of matching of the color and the micro glitter with the reference color, the formulation data, and the like. This selection method is not particularly limited.

The second toning method requires the above steps (5), (6) and (7) as essential steps. However, after step (7), the following steps (8) ) May be performed.

(8)

The step (8) is the same as the step (4) in the first toning method. The candidate paint mixture selected in the step (7) is corrected using the color matching calculation logic, and This is the process of obtaining a modified blend that is closer to the color.

The second toning method may further include a step of transmitting the candidate paint composition obtained in the above step (7) or the modified composition obtained in the step (8) to an electronic balance.

In the first toning method and the second toning method, the transfer of the blend to the electronic balance can be performed by using a telephone line, an optical cable, or the like. Compounding toning paint using Can be By applying the toning paint to prepare a toning progress coated plate, it can be determined whether or not this paint passes. If it does not pass, the color matching calculation logic can be activated based on the color data of the toning paint composition, the color data of the color toning coated plate and the brightness data of the mouth opening to obtain the corrected composition again.

Example

Hereinafter, the present invention will be described more specifically with reference to examples. Note that the present invention is not limited to the embodiments.

Equipment used and measurement method

In each of the following examples, the measurement of the reference color to match the coating color of the paint by toning was performed using a multi-angle colorimeter “Van-Van FA sensor” manufactured by Kansai Paint Co., Ltd. The color characteristic data of the primary color paints and the data on the brightness of the Miku Mouth are registered. The computer that operates the color matching calculation logic using each paint formulation and each data is Kansai Paint Co., Ltd. The test was performed at a computer, color and matching device "Van-Van FA Station". The "Van-Van FA sensor" described above can obtain color measurement values by measuring at three angles of 25 degrees, 45 degrees, and 75 degrees between the specular reflection axis and the light receiving axis. You can do it.

As the micro-brightness sample color chart, “Kansai Paint” manufactured by Kansai Paint Co., Ltd. was used. “Auto Color” is a booklet that lists the paint colors of automobiles in Japan and overseas by year and by car manufacturer. The micro-brightness between the standard colors and the same color paint colors listed in “Auto Color” Compare the feeling and select the closest paint color. The micro glitter measurement of the selected paint color is

_C stored in the database of “V an—V an FA station” Example

The standard colors of the coating surface of the car body are three colors: high brightness silver metal (silver M1), medium brightness green metallic pearl (green MP), and low brightness blue pearl (blue P). .

The color measurement values of the three reference colors under the three-angle conditions were as shown below.

table 1

The Miku mouth luminosity data (MGR, MBV) for each paint color that was the closest approximation selected from the auto color was as follows. In Table 2, MGR is a parameter that expresses the feeling of particles and MBV is a parameter that quantifies the feeling of glitter.

Table 2

Color MGR MB V Silver M1 approximate paint color 62.89 47.38 Green MP approximate paint color 56.50 40.50 Blue P approximate paint color 59.82 40.20 From the measured values of the three reference colors under the three-angle conditions and the data on the brightness of the Miku mouth of each paint color that was the closest approximation selected from the photo color, each primary color calculated by a computer, color matching device The paint amount (paint composition) was as follows.

Shinore I M 1

Primary color paint type

Silver A (Metallic primary color A) 41.

Silver B (Primary color B) 35.3

Black A (Primary black A) 0.9

Blue A (Primary blue A) 0.4

Auxiliary A (Aluminum alignment modifier A) 18.8

Auxiliary B (Aluminum alignment modifier B) 3.5

Green MP

Primary color paint type

Blue one A (Primary blue A) 42. 0

Green A (Primary green A) 24. 0

Silver C (Primary color C) 15.5

Blue B (Primary blue B) 5.0

Pearl A (Primary primary color A) 2.

Maroon A (Primary red tea A) 3

Auxiliary A (Aluminum alignment modifier A> 8, 4

Auxiliary B (Aluminum orientation modifier B) 1.7

Blue P

Primary color paint type Black B (Primary black B) 39.2

Blue C (Primary C) 22.3

Blue—D (Primary blue D) 19.1

Pearl B (Primary Pearl B) 10.5

Pearl C (Primary C) 8. 9

Met.

A toning progress coated plate was prepared with the above-mentioned paint composition. In the L * a * b * color system when the above-mentioned multi-angle colorimeter was measured under three-angle conditions, the measured color values of the base color and the color of the coating film of the above color-coordinated coated plate were as follows. It was.

Although the glossiness of the mouth of these toned paint plates and the reference color matched well, the color difference between the measured value of each paint color of the toned paint plate and the measured value of each reference color was large, Since there was also a difference in the visual judgment, the amount of each primary color paint (additional instruction amount) required to correct the color of the paint to be toned based on the color measurement value at each angle on the toned coating plate ) Was calculated by computer, color and matching device. The additional instruction amount at that time was as follows with respect to 100 parts by weight of the toning coating.

The additional instruction amount for 100 parts by weight of the toning paint in each paint color is silver M] Primary color paint type

Black A (Primary black A) 3.9

Auxiliary A (Aluminum alignment modifier A) 0.9

Auxiliary B (Aluminum alignment modifier B) 0.2

Green MP

Primary color paint type

Green A ((綠綠 primary color AA)) 7.5

Auxiliary agent A ((Aalumimi alignment alignment adjusting agent AA)) 0.5

Auxiliary agent B ((Aalumimi alignment alignment adjusting agent BB)) 0.9

Yellow A ((Yellow primary color AA)) 1.3

Blue P

Primary color paint type

Black B (Primary black B) 17.2

Blue one C (Primary blue C) 7.5

Met.

The process of each color toning obtained by coating with the paint that has been subjected to the correction of the additional amount indicated above, from the standard color when the coated plate is measured at each angle condition using a multi-angle colorimeter. The values of AL *, Aa *, Ab and ΔΕ * of the sample were as follows. Table 4

Since the color difference between the measured value of each paint color of the toned coated plate and the reference color after these corrections was small and the color judgment by visual inspection and the glossiness of the mouth opening were also passed, the toning paint after each correction After repair painting was performed on the car body using the method described above, color matching was determined visually for the repair painted part of the car body and the coating film surface in the vicinity, and good color matching was obtained.

Table 5 below shows the results of the data on the brightness of the Miku Mouth of each of the reference colors, the sample color chart of the Miku Mouth Glitter, and the color-adjusted coated plate after correction. The brightness data of Miku Mouth of each standard color and the toned coated plate after correction were measured with a micro-brightness measuring device manufactured by Minoru Yu Co., Ltd. for laboratory use, and the electronic images were processed by combi-sun. It is.

As is clear from the values of the micro glitter parameters MGR and MBV shown in Table 5 above, each reference color, Miku mouth glitter sample color chart, and the corrected tonal coating The difference between the MGR and MBV values between the veneers is within ± 3 for each paint color. The micro-brilliance was numerically combined.

_C can be performed by methods toning paint using a computer of the present invention, less toning's the toning experience toning of paint have a luminosity also accurately

Claims

The scope of the claims

1. (A) Colorimeter, (B) Micro glitter sample color chart, (C) Multiple paint formulations, color data corresponding to each paint formulation, Miku mouth glitter data, multiple primary color paints The color characteristic data and the glossiness characteristic data of Miku Mouth are registered, and a computer toning device comprising a computer in which a color matching calculation logic using the paint composition and the data is operated is used. The following steps (1;) to (3)

(1) a process of measuring a reference color to be matched with the paint color by toning with a colorimeter and obtaining color data of the reference color,

(2) a step of comparing the reference color with a sample color luminosity sample color chart and determining the mix luminosity of the reference color;

(3) Compare the color data and microbrightness of the reference color with the color data and microbrightness data corresponding to the paint formulation registered in advance in the computer, and register the color of the registered paint formulation. Indexing the degree of matching of Miku mouth glitter and selecting candidate paint formulations

And a method for toning a paint having a brilliant feeling.

2. After the above step (3), further perform (4) a step of correcting the selected candidate paint composition by using color matching calculation logic to obtain a corrected combination closer to the reference color. 2. The method of claim 1, wherein the toning is performed.

3. The toning method according to claim 1, further comprising transmitting the candidate paint formulation obtained in the step (3) or the modified formulation obtained in the step (4) to an electronic balance.

4. (A) a colorimeter, (B) a micro glitter sample color chart, (C) a plurality of color numbers, each paint composition corresponding to the color number, and a color data corresponding to each paint composition. A computer in which the color data and the color characteristic data of a plurality of primary color paints and the color characteristic data of the color mixture are registered, and the color matching calculation logic using each paint composition and each data is operated. The following steps (5) to (7) are performed by using a computer toning device composed of

(5) A process of measuring a reference color to be matched with the paint color by toning with a colorimeter and obtaining color data of the reference color,

(6) a step of comparing the reference color with a sample color chip of the mouth opening to determine the color opening of the reference color;

(7) Select color data and micro glitter data of at least one paint composition having the same color number as a preset color number of the reference color, and select color data and micro glitter data of the selected paint composition; Comparing the color data of the reference color and the gloss of the Miku mouth, indexing the degree of matching between the color and the glitter of the selected paint composition, and selecting a candidate paint composition. Toning method for paints with brilliant feeling.

5. After the above step (7), (8) a step of correcting the selected candidate paint composition by using color matching calculation logic to obtain a corrected combination that is closer to the reference color. 5. The toning method according to claim 4, wherein:

6. The toning method according to claim 4, further comprising transmitting the candidate paint formulation obtained in step (7) or the modified formulation obtained in step (8) to an electronic balance.